"This paper shows that in the 2000s unions in the UK and US made innovative use of the Internet to deliver union services and move toward open source unions better suited for the modern world than traditional union structures. In contrast to analysts who see unions as being on an inexorable path of decline, I argue that these innovations are changing unions from institutions of the Webbs to institutions of the Web, which will improve their effectiveness and revive their role as the key worker organization in capitalism"--National Bureau of Economic Research web site.